Spindle doffer guard



Get. 22, 1935. H. ERHARD I SPINDLE DOFFER GUARD 7 Filed Sept. 29, 1934 W/T/VESJ. fM/LE H. EEHA E0. C4 m/To/v J. CSoBuEN. BY M 5 a ATTORNEY.

Patented Oct. 22, 1935 UNITED STATES PATENT OFFICE SPINDLE DOFFER GUARD Emile H. Erhard, Dedham, Mass., assignor to Draper Corporation, Hopedale, Mass., a corporation of Maine The present invention pertains to spinning spindles of the type wherein a spindle blade is revolubly mounted in a bearing in a fixed base, and more particularly relates to means for detachably securing the spindle blade in the base against accidental displacement. Such means is known in the art as a dofi'er guard.

Of the prior dofier guards, the sleeve type, having a projection to overlie a flange on the whorl, is possessed of a number of advantages. It is particularly noted that such sleeves may be substantially devoid of projections which would accumulate lint and dirt and seriously hamper the cleaning of the spindles. However, such doffer guards as previously constructed were so insecure that they would loosen from vibration of the frame and accordingly they have not been used, at least to any appreciable extent.

Accordingly, it is an object of my invention to provide in a doffer guard of the sleeve type means for positively holding the sleeve in position, which means shall be so constructed as to not interfere with the rapid removal of the sleeve when it is desired to remove the spindle.

Further objects will be hereinafter more specifically enumerated, or will become apparent as the description proceeds.

In the specific embodiment of my invention herein disclosed, the spindle base is provided with an annular oil reservoir having a cylindrical wall. The sleeve fits over this wall and is provided with an inwardly projecting portion which overlies a flange on the whorl. A bayonet-type connection detachably secures the sleeve to the base, the pin of this connection being in the sleeve and the slot thereof being the base. A second pin is slidable in the sleeve in position to engage in the slot when the sleeve is turned to locking position. This second pin positively prevents accidental turning of the sleeve to unlocked position, but is so readily manipulated that it does not appreciably interfere with the intentional removal of the sleeve.

The said specific embodiment. which is at present preferred, is illustrated on the accompanying drawing, of which:

Fig. 1 is a view in elevation of the complete spindle;

Fig. 2 is a view similar to Fig. 1 but with the lower part of the spindle sectioned as indicated by line 22, Fig. 1;

Fig. 3 is a fragmentary elevational view of the spindle with the doifer guard sleeve removed; and

to, a base 3 fixed to the spindle rail R as by a '5":

nut 4, and a suitable bearing such as bolster 5 in which the spindle blade revolves.

The base includes a flange 6 and cylindrical wall 1 which constitute an oil reservoir. Oil

feeds from the reservoir through leads 8 into the 10 interior of the tubular portion 9, from whence it feeds through leads in the bolster to the spindle blade. The oil feeds up the spindle blade, over the top of the base and downwardly along the cylindrical surface l0 on the interior of the whorl, from whence it is thrown by centrifugal force against the frusto-conioal surface of oil-' collecting member I I.

The oil-collecting member receives the oil and returns it to the interior of the oil reservoir. The upper edge of this member terminates within a groove l2 formed in the lower face of the whorl. The member II, as well as the other parts of the spindle thus far described in detail are conveniently the same as in my co-pending application Serial Number 746,198, filed of even date herewith.

The external surface of the wall 1 is preferably cylindrical except for a bayonet slot therein. This slot is comprised of a vertical portion I3 which extends downwardly from the top of the wall 1, and a circumferentially extending portion M which communicates with and is angularly related to the portion l3. A cylindrical sleeve l5 fits over the wall 1, with a sliding fit. A projection, as pin IS in the sleeve cooperates with the slot, thereby forming a bayonet-type connection between the sleeve and the base.

The lower edge of the whorl is provided with an outwardly projecting annular flange l1, and an inwardly projecting portion on the sleeve I5 overlies this flange, whereby the sleeve serves as a readily removable doffer guard. Preferably, the said portion of the sleeve is constituted by inwardly turned rim I8.

My invention provides readily releasable means for positively locking the sleeve against accidental rotation. Such means in the present embodiment is constituted by a headed pin l9 which has a reduced portion intermediate its ends engaged in a vertical slot 20 in the sleeve. The pin may slide quite freely in its slot, and is so located that when the sleeve is in locked position (the pin l6 being then at the closed end of slot I4) the pin l9 drops down into the slot l3. Thus,

manually raised out of .the slot l3.

the sleeve cannot-be rotated until the pin I9 is This last operation may be performed practically simultaneously with the rotation and removal of the sleeve, and thus itperforms its functions without materially adding to the timerequired to remove the spindle blade from the base;

An advantage of the specific embodiment shown is that the pin l9 will assume its, locking position automatically. That is, when the sleeve is slid down onto the base and rotated to the position of Fig. 1, the pin I9 will move downwardly into'the slot I3 by gravity. 7

Having fully disclosed the preferred embodiment of my invention, I claim:

1. A spinning'spindle comprised of a spindle blade having a whorl fixed thereto, a base'hav- 'said spindie'revolves, a sleeve rotatably and detachably mounted on said base, said spindle extending through said sleeve, a flange on the lower edge .of said whorl, doffer guard means on said sleeve overlying said flange, and a manually operable pin mounted in said sleeve for sliding movements to and from a position where'it locks said sleeve to said base.

V 3. A spinningspindle comprised of a spindle blade having a whorl thereon, a base within which said spindle revolves, a sleeve rotatably and detachably mounted on said base, said spindle extending throughrsaid sleeve, a bayonet-type connection between said sleeve and base, a flange on the lower edge of said whorl, a portion on'said sleeve overlying said flange, and a pin carried by said sleeve and slidable axially thereof for engaging said 'base and thereby releasably looking said sleeve against rotation. 10

4. A spinning spindle comprised of a spindle blade, a whorl, a base having a cylindrical external surface, there being communicating circumferential and axially extending slots in said surface, a flange on said whorl, a detachable sleeve rotatably fitting over said surface, said sleeve having a portion overlying said flange, a projection on said sleeve engaging in said; circumferential slot, and a pin slidably mounted in'the sleeve for engaging said axially extendingslot to thereby releasably lock said sleeve against rotation.

5. A spinning spindle comprised of r a spindle blade, a whorl, a base having a cylindrical exte'r nal surface, a flange on said whorl, a sleeve r012}; tatably fitted over said surface, said sleeve'having a doiier guard portion overlying said flange, a bayonet-type connection between said sleeve and said base, and manually releasable means, in

addition to said connection, for automatically locking said sleeve, against rotation in either direction, said means being operable by gravity upon rotation of the sleeve to a predetermined position. V V V EMILE H. ERHARD, 

